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Samenvatting DET_5_Zonne_energie

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Samenvatting van 11 pagina's voor het vak Duurzame energietechnieken aan de UGent (DET_5_Zonne_energie)

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Zonne-energie:
1. Introduc e
- Geschiedenis van zonne-energie
o 1839: Ontdekking fotovoltaïsch(PV) effect
o PV cel, steeds met hoger rendement
o Toepassingen in de ruimtevaart
 Vanguard I satelliet(1958):
 6 antenne + 6 zonnecellen
 Communica e werd verloren
o Nu:
 exponen ele groei van de PV markt
 prijs per Wa daalt sterk (logaritmische schaal)
- enkele installa es:
o grootste PV installa e ter wereld: China (15.6 GW)
o grootste PV installatie BeNeLux: Lommel (130 MW)
o floating solar:
 zonnepanelen op het water
 minder verdamping water
 minder land-gebruik
 complexe installatie

2. Energie-inhoud van zonlicht
- Spectrum van het zonlicht
o Kernfusie in de kern van de zon
o Hoge oppervlaktetemperatuur
o Zon: zwarte straler(elektromagne sche straling)
 Alle straling, volledig geabsorbeerd + zelf straling uitzenden
(temperatuur)
o Spectrum: wet van Planck (~zwarte straler)

 K(B) = constante van Boltzmann
o Gassen absorberen spectrum in de atmosfeer
 Elke gas: specifieke frequen e

, - Zonneconstante
o = hoeveelheid gemiddelde binnenkomende
zonne-energie, buiten de atmosfeer, hoek = 0°
(=Air massa zero, AM0)

 (geel)
o Air massa 1.0 (AM1.0)
 = hetzelfde maar dan op het aardoppervlak, na gedeeltelijke
absorp e in de atmosfeer


 (rood)
o Grotere hoek: verder van evenaar
 Grotere afstand door de atmosfeer
 Meer absorp e, minder energie

o Algemeen:
o Europa, Amerika: (AM1.5): ~1000 W/m²
o Nog factoren; la tude, hoogte, luchtkwaliteit,…
- Seizoensvaria e
o Nadeel: beschikbaar in de zomer
o Rendement: hangt af van de temperatuur (best lage T)
 Vb. lentedag: miss. meer rendement dan jdens hi egolf
o Tijdens de dag: Piek op de middag
- Oplossing: ba erij (enkel intra- of inter-day opslag) geen seizoensopslag



- Maan-energie
o Gereflecteerd zon-licht
o 0.2-0.3 % van zonne-energie




3. Werking van een zonnecel
- Atoommodel van Bohr: silicium
o quantumfysica
o Atomen in ‘banden’
 Extra energie (foton): valen eband naar conduc eband (bewegen)
 4 valentei-elektronen

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Uploaded on
April 15, 2026
File latest updated on
April 15, 2026
Number of pages
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Written in
2025/2026
Type
SUMMARY

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